CN207349350U - A kind of automobile Double-drum type shock absorber of high reliability - Google Patents

Abstract

The utility model discloses a high-reliability automobile double-tube shock absorber, which comprises a working cylinder, a piston rod, a first piston, a guide seat, a buffer pad, an air bag spring group and a second piston. The first piston It is installed on the piston rod in parallel with the second piston, and both the buffer pad and the airbag spring set are installed between the guide seat and the second piston. The utility model is provided with an airbag spring group and a simple piston in the traditional double-barrel shock absorber. Through the compression and deformation of each airbag spring in the airbag spring group, the airbag spring produces a reverse elastic force on the second piston; A small hole is formed between the axial through holes of the second piston, and the oil is throttled through the small hole, thereby generating an additional damping force value; under the action of the elastic force generated by the airbag spring, the vibration reduction effect of the shock absorber is more gentle and effective, In the case of generating additional damping force values, the shock absorber works more reliably, thereby improving the shock absorber's vibration damping efficiency and the ride comfort of the car.

Description

A high-reliability automobile double-tube shock absorber

technical field

The utility model relates to a shock absorber, in particular to a high-reliability double-tube type shock absorber for automobiles.

Background technique

The main function of the shock absorber is to suppress the shock when the spring element rebounds after absorbing the shock and the impact from the road surface. When there is relative movement between the frame and the axle due to vibration, the piston inside the shock absorber reciprocates in the oil, and the oil flows back and forth through various valves, through holes and normal through holes under the action of oil pressure. The valve produces a damping force on the oil, and the friction between the hole wall and the oil forms a damping force on the vibration, thus consuming vibration energy, making the vibration attenuation, and improving the ride comfort of the car.

However, when the car is running under severe driving conditions, the oil pressure of the traditional car shock absorber will increase sharply during the working process, which will cause the internal parts of the piston to be more easily damaged. At the same time, the damping force required by the shock absorber is not easy to control. If the damping force is too large, it will affect the comfort of the car when driving on a flat road; Oscillation, the effect of vibration reduction cannot be achieved.

Chinese patent CN105889393A discloses "Shock Absorber and Vehicle with the Shock Absorber". The shock absorber provides a shock absorber with a coil spring installed between the guide seat and the piston. Due to the small stiffness of the coil spring, It is easy to be compressed to the limit state frequently, resulting in the weakening or loss of spring elasticity, and even permanent deformation. The utility model adopts three rubber airtight airbag springs with different internal compressed gas pressures, and the three airbag springs are installed on the piston rod in parallel. Since the stiffness of the airbag spring increases with the increase of the compressed gas pressure, the airbag is not easy to be compressed to the limit. State, can make the shock absorber achieve better cushioning effect, reliable work and long service life.

Utility model content

In view of the above-mentioned problems in the prior art, the purpose of this utility model is to propose a high-reliability automobile double-tube shock absorber, which can effectively slow down the trend of sharp increase in oil pressure, and the damping force can increase with The vehicle's driving conditions change to achieve an ideal shock absorption effect, thereby improving the ride comfort and comfort of the vehicle.

In order to achieve the above object, the technical solution adopted by the utility model is:

A high-reliability automobile double-tube shock absorber, including a working cylinder, a piston rod, a first piston, a guide seat, a buffer pad, an air bag spring group and a second piston, the first piston and the second piston The piston is installed in parallel on the piston rod, and the buffer pad and the airbag spring group are both installed between the guide seat and the second piston.

Further, the second piston has axial through holes uniformly distributed along the circumference, the second piston is sleeved on the piston rod and placed above the first piston, and the first piston and the The work of the second piston does not affect each other.

Further, the airbag spring set is sleeved on the piston rod and placed above the second piston, the airbag spring set is composed of a first airbag spring, a second airbag spring and a third airbag spring, the first The airbag spring, the second airbag spring and the third airbag spring are installed in parallel, the buffer pad is installed on the first airbag spring, between the first airbag spring and the second airbag spring and between the second airbag spring and the third airbag spring There are buffer pads; the pressure of the compressed gas in the first airbag spring, the second airbag spring and the third airbag spring increases sequentially from top to bottom, and the size of the airbags increases in turn, which makes the vibration reduction effect of the shock absorber more effective during the working process. Gentle and effective.

Further, when the deformation of the first airbag spring and the second airbag spring reach the maximum, their edges will not contact the working cylinder, and when the deformation of the third airbag spring reaches the maximum, the edges will not The through hole on the second piston is completely closed; the inner layer of each airbag spring is made of airtight rubber, and the outer layer is made of oil-resistant rubber.

Compared with the prior art, the utility model has the beneficial effects of:

By setting three airbag springs with different air pressures and sizes between the piston and the guide seat, when the car is running under severe driving conditions, due to the compression deformation of the airbag spring, the airbag spring will produce a reverse elastic force on the piston, which can Slow down the trend of sharp increase of oil pressure, make the vibration damping effect of the shock absorber more gentle and effective during the working process, thereby improving the ride comfort of the car.

By installing the second piston between the third airbag spring and the first piston, in the stretching stroke of the shock absorber, when the third airbag spring is compressed and deformed, as the deformation increases, the shaft on the second piston will The area of the through hole covered by the third airbag spring is getting larger and larger, and the oil in the upper chamber is throttled through the small hole formed by the third airbag spring and the axial through hole of the second piston under pressure, thus producing a Additional damping force value.

At the same time, by arranging a buffer pad between the upper end of the first airbag spring and each airbag spring, the force of each airbag spring in the process of being compressed is more uniform, and it can play a guiding role, reducing the pressure of the airbag spring. The friction between the wall of the working cylinder and the working process makes the shock absorber work more reliably and prolongs the life of the shock absorber.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a top view of the second piston of the present invention.

Fig. 3 is a sectional view of the airbag spring of the present invention.

Reference signs: guide seat 1, piston rod 2, working cylinder 3, buffer pad 4, first airbag spring 5, second airbag spring 6, third airbag spring 7, second piston 8, axial through hole 9, The first piston 10, the air bag spring group 11.

Detailed ways

The technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention. The accompanying drawings are only used to illustrate the utility model, and do not represent the actual structure and true scale of the utility model.

Please refer to Fig. 1-Fig. 3, Fig. 1 is the structure schematic diagram of the present utility model, a kind of high-reliability automobile double cylinder shock absorber, comprises working cylinder barrel 3, piston rod 2, first piston 10, guide seat 1 , buffer pad 4, air bag spring group 11 and second piston 8, described first piston 10 and described second piston 8 are installed on the described piston rod 2 in parallel, described buffer pad 4 and described air bag spring group 11 All are installed between the guide seat 1 and the second piston 8 .

Fig. 2 is a top view of the second piston of the present invention, the second piston 8 has axial through holes 9 uniformly distributed along the circumference, the second piston 8 is sleeved on the piston rod 2 and placed on the Above the first piston 10, the work of the first piston 10 and the second piston 8 do not affect each other.

Fig. 3 is a sectional view of the airbag spring of the present invention, the airbag spring group 11 is sleeved on the piston rod 2 and placed above the second piston 8, the airbag spring group 11 is composed of the first airbag spring 5, The second airbag spring 6 and the third airbag spring 7 constitute, the first airbag spring 5, the second airbag spring 6 and the third airbag spring 7 are installed in parallel, the cushion pad 4 is installed on the first airbag spring 5, the first airbag spring 5 Between the second airbag spring 6 and between the second airbag spring 6 and the third airbag spring 7, cushion pads 4 are installed; the compressed gas in the first airbag spring 5, the second airbag spring 6 and the third airbag spring 7 The air pressure increases sequentially from top to bottom, and the size of the airbag increases sequentially, making the vibration reduction effect of the shock absorber more gentle and effective during the working process.

Wherein when the deformation of the first air bag spring 5 and the second air bag spring 6 reach the maximum, their edges will not contact the working cylinder, and when the deformation of the third air bag spring 7 reaches the maximum, the edges will not The through hole on the second piston 8 will be completely closed.

The working principle of this embodiment:

When the shock absorber is stretched, the first piston 10, the second piston 8 and the airbag spring group 11 move up with the piston rod 2, and when the buffer pad 4 contacts the guide seat 1, the first airbag spring 5 is compressed, and then As the amount of compression increases, the first airbag spring 5, the second airbag spring 6 and the third airbag spring 7 are compressed simultaneously, and as the deformation of the third airbag spring 7 increases, the axial passage on the second piston 8 The area of hole 9 covered by the third airbag spring 7 is getting larger and larger, and the oil in the upper cavity is throttled through the small hole formed by the third airbag spring 7 and the axial through hole 9 of the second piston 8 under pressure, thereby An additional damping force value is produced; the group of air bag springs 11 and the small holes formed together provide additional damping force for the shock absorber. When the shock absorber is compressed, the air bag spring group 11 in the compressed state has a reverse force on the second piston 8, pushing the piston to move down quickly so that the damping force produced by the shock absorber is small, so as to make full use of the sleeve in the The elasticity of the elastic elements on the shock absorber cushions the impact.

Claims (4)

1. a kind of automobile Double-drum type shock absorber of high reliability, including work cylinder barrel（3）, piston rod（2）, first piston（10）、 Guide holder（1）, cushion pad（4）, air bag spring group（11）And second piston（8）；It is characterized in that, the first piston（10） With the second piston（8）It is installed in parallel in the piston rod（2）On, the cushion pad（4）With the air bag spring group（11） It is installed in the guide holder（1）With the second piston（8）Between.

2. the automobile Double-drum type shock absorber of a kind of high reliability according to claim 1, it is characterised in that described second lives Plug（8）On have the axially extending bore being uniformly distributed along the circumference（9）, the second piston（8）It is sheathed on the piston rod（2）Go up and be placed in institute State first piston（10）Top, the first piston（10）With the second piston（8）Work be independent of each other.

A kind of 3. automobile Double-drum type shock absorber of high reliability according to claim 1, it is characterised in that the air bag bullet Spring group（11）It is sheathed on the piston rod（2）Go up and be placed in the second piston（8）Top, the air bag spring group（11）By One air bag spring（5）, the second air bag spring（6）With the 3rd air bag spring（7）Form, the first air bag spring（5）, the second air bag bullet Spring（6）With the 3rd air bag spring（7）It is installed in parallel, the first air bag spring（5）On cushion pad is installed（4）, the first air bag spring （5）With the second air bag spring（6）Between and the second air bag spring（6）With the 3rd air bag spring（7）Between be mounted on buffering Pad（4）；First air bag spring（5）, the second air bag spring（6）With the 3rd air bag spring（7）Interior compressed gas air pressure is from upper past Under it is incremented by successively, the size of air bag is sequentially increased.

A kind of 4. automobile Double-drum type shock absorber of high reliability according to claim 3, it is characterised in that first gas Capsule spring（5）With the second air bag spring（6）When deflection reaches maximum, its edge will not be with the work cylinder barrel（3）Contact, 3rd air bag spring（7）When deformation is up to amount to maximum, its edge will not be by the second piston（8）On through hole seal completely Close.